Rs (Ω.Cm2) Rm (Ω.Cm2) CPE (F.cm2) W (Ω.Cm2) Gold 259,456 134,980 2,197.10-5 1645,035 Gold+ MWCNTs 259,124 7185,340 5,132.10-5 293,132 Gold+ MWCNTs+ anti-IgG 261,034 221,654 1,034.10-5 1734,181 Gold+ MWCNTs + anti- IgG+BSA 261,112 490,045 1,980.10-5 1801, 445 Gold+MWCNTs+anti- IgG+BSA+ Ag (10pg/ml) 260,305 555,009 0,238.10-5 1635,005

Table1: The electrical parameters of Randle’s circuit obtained with the fitting program. The fit error was kept under a maximum of 10%.